Nitrogen fractions and amino acid content in alfalfa and red clover immediately after cutting and after wilting in the field
PBN-AR
Instytucja
Wydział Bioinżynierii Zwierząt (Uniwersytet Warmińsko-Mazurski w Olsztynie)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Journal of Elementology
ISSN
1644-2296
EISSN
Wydawca
Polskie Towarzystwo Magnezologiczne
DOI
Rok publikacji
2014
Numer zeszytu
3
Strony od-do
723-734
Numer tomu
19
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
alfalfa
red clover
nitrogen fractions
amino acids
wilting.
Streszczenia
Język
en
Treść
The aim of this study was to determine the composition of nitrogen fractions in alfalfa and red clover, which differ in proteolytic activity, and to evaluate the effect of wilting on changes in nitrogen fractions in alfalfa and red clover herbage. Total nitrogen was divided into protein and non-protein nitrogen, and the amino acid profile of protein was analyzed. Buffer-soluble nitrogen (BSN), including buffer-soluble protein nitrogen (BSPN) and non-protein buffer-soluble nitrogen (NPBSN), was determined. The NPBSN fraction was further subdivided into peptide nitrogen, amino acid nitrogen, neutral detergent-insoluble nitrogen (NDIN) and acid detergent-insoluble nitrogen (ADIN). Wilting in the field to 40% dry matter content (the swath was tedded once) did not reduce the total nitrogen content of alfalfa and red clover herbage, although it affected the concentration of the BSNfraction, in particular NPBSN, and free amino acid nitrogen. During alfalfa wilting, the soluble protein content decreased and the concentrations of non-protein nitrogen compounds increased, mostly due to an increase in free amino acid nitrogen. A reverse trend was observed during red clover wilting – the concentrations of non-protein nitrogen compounds decreased and soluble protein content increased. A decrease was also noted in peptide nitrogen, NDIN and ADIN. Wilting of alfalfa and red clover had no adverse effect on the amino acid profile of protein. The concentrations of essential amino acids that limit milk protein synthesis, i.e. Lys, Met, His and Arg, did not decrease. Legume wilting in the field contributes to an increase in the concentrations of soluble nitrogen in the plant material intended for ensiling.
Cechy publikacji
ORIGINAL_ARTICLE
Inne
System-identifier
489360
CrossrefMetadata from Crossref logo
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